Development and Effects of New Method of Conveying Materials for Construction of Cast-in-Place Concrete Slabs

In construction of bridges with cast-in-place concrete slabs, we often observe that materials of floor slabs are conveyed by human power in construction sites where transportation of materials by cranes or other large and heavy equipments are restrained. Since a possibility of substantial cost reduction was anticipated through rationalization of such conveyance work, we developed the new method of conveying materials for construction of cast-in-place concrete slabs. This method is to convey materials by the self-propelling carriage on monorail installed on main girder flange. This method features: installation and removal of rails are easy; the carriage can be operated in a narrow space; heavy materials can be conveyed in block; the method is applicable to curved girders and road-widening sections; and the cost is low.